A fireball reportedly caused by an exploding electrical transformer illuminated the sky in Maryland Monday, according to a driver’s dashcam footage of the incident.

The witnesses who captured the video said they saw a huge explosion while driving along a road in Gaithersburg.

“[My wife and I] saw a huge explosion and fireball ascending upwards of 50 to 80 feet high,” the male witness said. “It was just ahead of us on the right. When we slowed, we could see the grass was also on fire. We then passed fairly close by the burning transformer, hoping it wouldn’t explode again.”

The explosion reportedly knocked out power in the area for three to four hours, the witness added.

Fireball explosions are not uncommon in the United States.

A fireball exploded over South Jersey in December and was visible across much of the Northeast in Pennsylvania, Maryland, Virginia, New York, Maryland, Ohio, Connecticut, Delaware, West Virginia, Rhode Island, Massachusetts, New Hampshire, and Washington, DC.